The document provides a wanted poster for the round goby fish, describing it as an alien invader in the Great Lakes that commits crimes such as stealing all the food and bait from hooks. It lists distinguishing features such as a large gray head with black and brown patches and a length of 5 to 6 inches. The document recommends not using the round goby for bait and offers a reward of a good day of fishing for more information about controlling this invasive species.